Photographic pbintffig feame



@uitrit tetra gamut ft'irr.`

PHOTOGRAPBIG PRINTING FRAME.

SPECIFICATION. T0 ALL WHOM IT MAY CONCERN:

Be it known that I, C. L. LOCHMAN, of Carlisle, in the county ot Cumberland, and State of Pennsylvania, have invented a new and useful improvement on a Porcelain Printing Frame used for printing porcelain pictures, or opaltypes and glass transparencies, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings 4making a part of this specification:

Figure 1 is a perspective view of my frame. The body, A A, is rectangular in form. L The two cross-pieces, one of which is shown at A and the other is covered under the lid at the hinges, are rabbeted to support the shoulders at the ends of the moving bars, F F, and in which they slide. v These pieces or bars are kept horizontally to the face ofY theframe by means of four T-shaped pieces of metal stays, secured by screws to the ends of said bars on their opposite sides, as shown in iig. 2, a a a a'. These bars are intended tohave a parallel motion, and each is rabbeted on the inner side to a depth a little less than the ordinary thickness of negative glass, to give rest to the negative. C is the negative, `held in `place by said bars. E, E, E are three Awooden screws, which give pressure to the above-mentioned bais in holding the negative. l

The lid, B, is longitudinally slotted, in which slits two pairs of screws, g gg g', are made to move. To said screws, on the opposite side of the lid, (as shown with dotted lines,) are riveted two metal bars, G G. To this lid is hinged the adjustable piece, J, which is mortised at each end, through which the screws, H, H, are admitted, allowing the hinged bar to move up and down a little, and, when properly adjusted, to be fastened with a pair of burrs, as shown at H, H. y v

The lid is provided with a. spring,f, to keep a continual pressure on the negative when in use.

Figure 2 shows the reverse or opposite side of the frame, with the movable parallel bars, F, F, screws, E, E, E', and adjustable piece, J, with fastening screws and burrs.

With this frame all the ordinary, as well as any unusual, Size negative can be used indiscriminately with any regular or irregular porcelain plate or glass to receive an impression.

I use my -frame by placing the negative in the rabbets of the bars F, F, after the bars having been properly adjusted, and tighten it with the screw, E', acting on its accompanying bar; then I lay back the lid, B, placing the insidehorizontal with the part of the frame holding-the negative. now take my prepared plate, and commonly take two strips of albumen paper, 'moisten them with the tongue, and paste them on the back of the proper opposite ends of the said plate, leaving a projection of the paper of about three-ei'ghths of an inch; it is now laid, prepared side upward, on the lid in its proper place, the projected ends of the paper clasped by the bars, Gr, G, and fastened with their screws, and so held from moving. The lid is now shut, the screw, H H,

being loosened for the lid to adapt itself to the thickness of the plate and negative, then tightened so that the lid can be opened and shut without disturbing the relations of the plate and negative and lastly the spring, f, is pressed in its staples, and the plate is ready for exposure to the light.

I am aware that David Shive, of Philadelphia, has patented a porcelain printing frame, which supports a negative with one screw and one bar, having two perpendicular pieces sliding in grooves of the frame, which is not adjustable to any sizenegative. Such a device I do not claim; but what I claim and desire to secure -by Letters Patent, is

1. I claim on the one side or body of a photographic printing frame two adjustable rabbeted bars, F, F, to hold a negative in place, in combination with two yor more tightening screws, E, E, E', or their equivalents, constructed and operated in the manner substanttally as Shown and described, and for the purpose set forth.

2. I claim the adjustable hinged piece or bar, J, with its mortised ends and supporting screws and bui-rs, constructed and operated substantially in the manner set foth.

c. L. LOCHMAN.

Witnesses:

A. L. SPoNsLEn, JOSEPH HEIsER. 

